[Balloon] second frame buffer

[Nick Bane]

> Is there a way to easily construct a second frame buffer that can be swapped 
> with the first one?  How then would one switch between frame buffers?
> --Glen
> 
If you look at the sources for the sa1100 framebuffer you can see that 
it is possible to manipulate the relevant memory in the driver though 
there is no provision for it.

You can switch framebuffers using virtual consoles as one can with 
alt-f[n] as one can on a standard pc style install. I have a pxa270 
development system doing just that.

Alternatively you can read/write the file /dev/fb0. For rapid switching 
you would probably want to mmap the data and memcpy the framebuffer to 
application malloc'd ram.

Hope that helps.

Nick Bane

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